A mother who hides her strength also hides her father

Has anyone read a romance-fantasy like this? Right after a Holy Knight named Seraphina defeated the Demon King and saved the world, she went into deep hiding. Because… she’d had a child. I don’t know why she ran away with her daughter, but from the looks of it, this novel must be a reverse harem—since the Holy Knight had three boyfriends. As expected, in romance-fantasy, any job starting with “Holy” is always the most… open-minded. Anyway, the three men went crazy searching for her. Then, ten years later, a girl who looked exactly like the heroine suddenly appeared. As a brand-new student… at the very school where those three male leads were working as teachers. Once the three men realized she was the child of their vanished lover, all hell broke loose. They fought over whose daughter she